Duplex speakerphone



FIG. 1 is an isometric view of the duplex speakerphone;

FIG. 2 is a rear view of the duplex speakerphone;

FIG. 3 is a front view of the duplex speakerphone;

FIG. 4 is a right side view of the duplex speakerphone;

FIG. 5 is a left side view of the duplex speakerphone;

FIG. 6 is a top side view of the duplex speakerphone; and,

FIG. 7 is a bottom view of the duplex speakerphone.

CLAIM The ornamental design for a duplex speakerphone, as shown anddescribed.